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Loans and Allowance for Loan Losses (Details 4) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of year	$ 3,203,158us-gaap_LoansAndLeasesReceivableAllowance	$ 6,141,281us-gaap_LoansAndLeasesReceivableAllowance	$ 7,400,049us-gaap_LoansAndLeasesReceivableAllowance
Provision for loan losses	515,000us-gaap_ProvisionForLoanAndLeaseLosses	300,000us-gaap_ProvisionForLoanAndLeaseLosses	430,000us-gaap_ProvisionForLoanAndLeaseLosses
Charge-offs	(1,581,992)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs	(4,708,605)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs	(2,868,576)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs
Recoveries	1,358,963us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	1,470,482us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	1,179,808us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts
Balance, end of year	3,495,129us-gaap_LoansAndLeasesReceivableAllowance	3,203,158us-gaap_LoansAndLeasesReceivableAllowance	6,141,281us-gaap_LoansAndLeasesReceivableAllowance
Commercial Real Estate Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of year	1,549,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember	2,549,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember
Provision for loan losses	360,000us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember	811,000us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember
Charge-offs	(470,000)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember	(1,879,000)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember
Recoveries	156,000us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember	68,000us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember
Balance, end of year	1,595,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember	1,549,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialRealEstateMortgageMember
Consumer Real Estate Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of year	938,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember	1,528,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember
Provision for loan losses	731,000us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember	11,000us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember
Charge-offs	(896,000)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember	(842,000)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember
Recoveries	324,000us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember	241,000us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember
Balance, end of year	1,097,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember	938,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerRealEstateMortgageMember
Construction and Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of year	319,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember	1,241,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember
Provision for loan losses	(902,000)us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember	(787,000)us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember
Charge-offs	(58,000)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember	(1,193,000)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember
Recoveries	771,000us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember	1,058,000us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember
Balance, end of year	130,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember	319,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConstructionAndLandDevelopmentMember
Commercial and Industrial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of year	352,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember	809,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember
Provision for loan losses	336,000us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember	143,000us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember
Charge-offs	(108,000)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember	(699,000)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember
Recoveries	58,000us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember	99,000us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember
Balance, end of year	638,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember	352,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_CommercialAndIndustrialLoansMember
Consumer and Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, beginning of year	45,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember	14,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember
Provision for loan losses	(10,000)us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember	122,000us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember
Charge-offs	(50,000)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember	(96,000)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember
Recoveries	50,000us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember	5,000us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember
Balance, end of year	$ 35,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember	$ 45,000us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = csbq_ConsumerAndOtherLoansMember

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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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